CN210134986U - Valve seat insert bottom hole and have its cylinder head - Google Patents
Valve seat insert bottom hole and have its cylinder head Download PDFInfo
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- CN210134986U CN210134986U CN201920756096.2U CN201920756096U CN210134986U CN 210134986 U CN210134986 U CN 210134986U CN 201920756096 U CN201920756096 U CN 201920756096U CN 210134986 U CN210134986 U CN 210134986U
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- chamfer
- valve seat
- bottom hole
- valve
- seat insert
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Abstract
The utility model belongs to the technical field of the engine accessories, concretely relates to valve seat insert bottom hole and have its cylinder head. This valve seat circle bottom hole is equipped with the chamfer, the chamfer includes the edge first chamfer and the second chamfer that the radial direction of valve seat circle bottom hole set up from inside to outside, first chamfer with second chamfer forms the ladder chamfer, the chamfer angle of first chamfer is less than the chamfer angle of second chamfer. The utility model provides a valve seat circle bottom outlet leads through the ladder chamfer, and the air current can not bump with valve seat circle bottom outlet at the in-process that flows, has reduced the energy loss of air current at the in-process that flows, under the prerequisite that satisfies radial design boundary, improves the flow coefficient and the circulation ability of air flue, improves the dynamic behavior of engine.
Description
Technical Field
The utility model belongs to the technical field of the engine accessories, especially, relate to a valve seat insert bottom hole and have its cylinder head.
Background
The valve seat ring is arranged in a valve seat ring bottom hole on the cylinder cover body, and when an engine is used for air intake, airflow enters the valve, the valve seat ring bottom hole and a channel formed by chamfering the valve seat ring bottom hole from an air passage and enters the cylinder. The outer design boundary of the valve seat ring bottom hole chamfer is determined by the position of the cylinder head gasket pressure wave, and the valve seat ring bottom hole chamfer cannot cross the boundary.
The existing valve seat ring bottom hole chamfering structure is not beneficial to the flow of air flow, and the flow coefficient of an air passage can be reduced. When the valve is opened, the airflow collides with the bottom hole of the valve seat ring in the flowing process, so that the flowing speed of the airflow is reduced; meanwhile, the air flow also loses energy in the flowing process due to the reduction of the flow area.
In order to avoid collision between airflow and a bottom hole of the valve seat ring, the improvement is generally carried out by arranging a larger chamfer angle of the bottom hole of the valve seat ring; however, the increase of the chamfer causes collision with the chamfer in the flowing process of the airflow, still causes loss of flow energy and reduces the flow coefficient of the air passage.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an air current flow in-process is solved at least because of the great problem of the energy loss that flows that leads to with the collision of valve seat circle bottom outlet. The purpose is realized by the following technical scheme:
the utility model discloses a first aspect provides a valve seat circle bottom outlet, valve seat circle bottom outlet is equipped with the chamfer, the chamfer includes the edge first chamfer portion and the second chamfer portion that the radial direction of valve seat circle bottom outlet set up from inside to outside, first chamfer portion with second chamfer portion forms the ladder chamfer, the chamfer angle of first chamfer portion is less than the chamfer angle of second chamfer portion.
The utility model provides a valve seat circle bottom outlet leads through the ladder chamfer, and the air current can not bump with valve seat circle bottom outlet at the in-process that flows, has reduced the energy loss of air current at the in-process that flows, under the prerequisite that satisfies radial design boundary, improves the flow coefficient and the circulation ability of air flue, improves the dynamic behavior of engine.
In addition, according to the utility model provides an above-mentioned valve seat insert bottom outlet still can have following additional technical characterstic:
in some embodiments of the present invention, the upper edge of the first chamfer portion is connected to the aperture edge of the valve seat insert bottom hole, and the lower edge of the first chamfer portion is connected to the second chamfer portion.
In some embodiments of the present invention, an included angle α between the first chamfer portion and the bottom surface of the cylinder head is smaller than or equal to a secondary sealing surface of the valve seat ring and an included angle δ between the bottom surfaces of the valve seat ring, and the secondary sealing surface is a surface on which the inner wall of the valve seat ring contacts with the disk surface of the valve.
In some embodiments of the present invention, the angle β between the second chamfer and the bottom surface of the cylinder head is greater than or equal to the angle γ between the bottom surface of the valve and the valve sealing surface.
In some embodiments of the present invention, a distance H between the lower edge of the first chamfer and a bottom surface of the cylinder head1Is greater than or equal to the distance H between the upper edge of the first chamfered portion and the bottom surface of the cylinder head 230% of the total.
In some embodiments of the present invention, a radial dimension between an outer edge of the second chamfer and a central axis of the valve is less than or equal to a distance between a position of a cylinder head gasket pressure wave and the central axis of the valve.
In some embodiments of the invention, the first and second chamfered portions are rounded corners.
The utility model discloses a second aspect provides a valve seat circle bottom outlet, valve seat circle bottom outlet is equipped with the chamfer, the chamfer includes the edge first chamfer and the second chamfer that radial direction of valve seat circle bottom outlet set up from inside to outside, first chamfer with second chamfer forms the ladder chamfer, first chamfer is the arc chamfer, second chamfer is the radius angle.
Further, the first chamfer part is a circular arc chamfer with a curvature radius of R, or the first chamfer part is an arc chamfer with a gradually changing curvature radius.
The third aspect of the utility model provides a cylinder head with above-mentioned valve seat insert bottom outlet.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like parts are designated by like reference numerals throughout the drawings. In the drawings:
FIG. 1 schematically illustrates a schematic structural view of a valve seat insert bottom hole according to an embodiment of the present invention;
FIG. 2 schematically illustrates another structural schematic of a valve seat insert bottom hole according to an embodiment of the present invention;
FIG. 3 schematically illustrates yet another structural view of a valve seat insert bottom hole in accordance with an embodiment of the present invention;
the reference numerals in the drawings denote the following:
10-valve seat ring bottom hole, 1-chamfer, 11-first chamfer, 111-upper edge, 112-lower edge, 12-second chamfer;
101-the bottom surface of the cylinder head;
20-valve, 201-bottom surface of valve, 202-disk surface of valve;
30-valve seat ring; 40-airway; 50-position of cylinder head gasket pressure wave.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.
Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
FIG. 1 is a schematic structural view of a bottom hole of a valve seat insert according to an embodiment of the present invention; FIG. 2 is a schematic view of a valve seat insert bottom hole according to another embodiment of the present invention; fig. 3 is a schematic structural view of a valve seat retainer bottom hole according to yet another embodiment of the present invention. As shown in fig. 1, according to the embodiment of the present invention, a valve seat ring bottom hole 10 is provided, the valve seat ring bottom hole 10 is provided with a chamfer 1, the chamfer 1 includes a first chamfer 11 and a second chamfer 12 provided from inside to outside along the radial direction of the valve seat ring bottom hole 10, the first chamfer 11 and the second chamfer 12 form a step chamfer, and the chamfer angle of the first chamfer 11 is smaller than the chamfer angle of the second chamfer 12. The chamfer angle refers to the included angle between the chamfer inclined plane and the central axis of the bottom hole 10 of the valve seat ring.
The cylinder head of engine is provided with valve 20 to valve 20 arranges along vertical direction, and valve seat insert 30 pressure equipment is in the cylinder head on with valve 20 cooperation, and processing has the valve seat insert bottom hole 10 with valve seat insert 30 matched with on the cylinder head, and valve seat insert bottom hole 10 is seted up on the bottom surface 101 (the fire face) of cylinder head, and valve seat insert 30 installs in valve seat insert bottom hole 10 with interference fit's mode.
When the engine is charged, the valve 20 is opened, the airflow entering from the air passage 40 enters the cylinder through the airflow channel formed between the disc surface 202 of the valve 20 and the valve seat ring 30 and the valve seat ring bottom hole 10, the airflow flowing through the first airflow channel formed between the first chamfer part 11 and the disc surface 202 of the valve 20 is less under the action of chamfering, the airflow flowing through the first airflow channel is increased along with the increase of the valve opening 20, and the airflow enters the combustion chamber through the second airflow channel formed between the second chamfer part 12 and the disc surface 202 of the valve 20.
The utility model provides a valve seat circle bottom outlet 10 leads through the ladder chamfer to the chamfer angle of first chamfer 11 is less than the chamfer angle of second chamfer 12, can reduce the air current by a wide margin and at the in-process that flows and the collision between valve seat circle bottom outlet 10 from this, has reduced the loss of air current at the in-process that flows, under the prerequisite that satisfies radial design boundary, improves the flow coefficient and the circulation ability of air flue, improves the dynamic behavior of engine.
The included angle α between the first chamfer part 11 of valve seat circle bottom hole 10 and the bottom surface 101 of cylinder head is less than or equal to the contained angle delta between the secondary seal face of valve seat circle 30 and the bottom surface of valve seat circle 30, valve 20, valve seat circle 30 and valve seat circle bottom hole 10 can realize good cooperation, when the air current flows through the first airflow channel that forms between valve 20 and the first chamfer part 11, guarantee that the air current is smooth and easy, further reduce the collision of air current and the inner wall of first chamfer part 11, effectively reduce the energy loss of air current in the air flue, improve the flow coefficient of air flue.
In some embodiments of the present invention, the included angle β between the second chamfer portion 12 of the valve seat bottom hole 10 and the bottom surface 101 of the cylinder head is greater than or equal to the included angle γ between the bottom surface 201 of the valve 20 and the valve sealing surface (the disk surface 202 of the valve), the valve 20, the valve seat 30 and the valve seat bottom hole 10 can realize good cooperation, so that when the air current flows through the second air flow channel formed between the valve 20 and the second chamfer portion 12, the collision between the air current and the inner wall of the second chamfer portion 12 is further reduced, the wall-hitting air current in the air channel is reduced, and the air input is improved.
The utility model disclosesIn some embodiments, the upper edge 111 of the first chamfered portion 11 is connected to the opening edge of the valve seat bottom hole 10, and the lower edge 112 of the first chamfered portion 11 is connected to the second chamfered portion 12. The distance H between the lower edge 112 of the first chamfered portion 11 and the bottom surface 101 of the cylinder head1Is greater than or equal to the distance H between the upper edge 111 of the first chamfered portion 11 and the bottom surface 101 of the cylinder head 230% of the first flow path, the intake airflow of the first flow path can be increased, and the airflow can smoothly enter even in the case where the opening degree of the valve 20 is small.
Through the circulation capacity test of the air passage, the stepped first chamfer part 11 and the stepped second chamfer part 12 are matched, so that the flow coefficient of the air passage can be improved by about 1-3%.
In some embodiments of the present invention, the radial dimension between the outside edge of the second chamfer 12 and the central axis of the valve 20 is less than or equal to the distance between the location 50 of the cylinder head gasket pressure wave and the central axis of the valve 20, satisfying the outside design boundary of the valve seat ring bottom hole chamfer 1.
In this embodiment, the first chamfer portion 11 and the second chamfer portion 12 are both rounded corners, and the inclined surfaces thereof are conical surfaces, so that the processing is convenient.
As shown in fig. 2 and 3, the second aspect of the present invention provides a valve seat insert bottom hole 10, the valve seat insert bottom hole 10 is provided with a chamfer 1, the chamfer 1 includes a first chamfer 11 and a second chamfer 12 provided from the inside to the outside along the radial direction of the valve seat insert bottom hole, the first chamfer 11 and the second chamfer 12 form a step chamfer, and the first chamfer 11 is an arc chamfer and the second chamfer 12 is a chamfer. The first chamfer part 11 is an arc chamfer, so that the air flow movement resistance in the air flow channel can be reduced, and the air flow circulation capacity is improved.
As shown in fig. 2, in some embodiments of the present invention, the first chamfer portion 11 is a circular arc-shaped chamfer with a curvature radius R, the upper edge 111 of the first chamfer portion 11 is connected with the orifice edge of the valve seat ring bottom hole 10, the lower edge 112 of the first chamfer portion 11 is connected with the second chamfer portion 12, the circular arc-shaped chamfer has an inwardly convex arc-shaped portion, the chamfer angle of the circular arc-shaped chamfer is close to 0 at a position close to the upper edge 111, which can reduce the collision between the air flow and the inner wall of the first chamfer portion 11, and reduce the air flow loss caused by the collision.
As shown in fig. 3, in other embodiments of the present invention, the first chamfer portion 11 is an arc-shaped chamfer with gradually changing curvature radius, the lateral profile thereof is a spline curve, the upper edge 111 of the first chamfer portion 11 is connected with the orifice edge of the valve seat ring bottom hole 10, the lower edge 112 of the first chamfer portion 11 is connected with the second chamfer portion 12, the arc-shaped chamfer is inwardly convex, and the curvature radius along the direction from the upper edge 111 to the lower edge 112 is gradually increased, so that the chamfer angle of the arc-shaped chamfer close to the position of the upper edge 111 is smaller, and when the air flow is smooth, the collision between the air flow and the inner wall of the first chamfer portion 11 is effectively reduced, and the flow coefficient of the air passage is improved.
Further, the chamfering depth of the first chamfering part 11 is greater than that of the second chamfering part 12, so that an airflow channel formed by the disc surface 202 of the valve 20 and the first chamfering part 11 is wider, the smoothness of airflow is ensured, and the flow coefficient of the airflow channel is further improved. The chamfer depth mentioned above refers to the axial dimension of the chamfer 1.
The third aspect of the utility model provides a cylinder head with above-mentioned valve seat insert bottom outlet.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a valve seat circle bottom hole, valve seat circle bottom hole is equipped with the chamfer, a serial communication port, the chamfer includes the edge first chamfer and the second chamfer that the radial direction of valve seat circle bottom hole set up from inside to outside, first chamfer with second chamfer forms the ladder chamfer, the chamfer angle of first chamfer is less than the chamfer angle of second chamfer.
2. The valve seat insert bottom hole of claim 1, wherein an upper edge of the first chamfer connects with an aperture edge of the valve seat insert bottom hole, and a lower edge of the first chamfer connects with the second chamfer.
3. The valve seat insert bottom hole of claim 1, wherein the angle α between the first chamfer and the bottom surface of the cylinder head is less than or equal to the angle δ between the secondary sealing surface of the valve seat insert, which is the surface where the inner wall of the valve seat insert contacts the disk surface of the valve, and the bottom surface of the valve seat insert.
4. The valve seat insert bottom hole of claim 1, wherein the angle β between the second chamfer and the bottom surface of the cylinder head is greater than or equal to the angle γ between the bottom surface of the valve and the valve sealing surface.
5. The valve seat insert bottom hole of claim 2, wherein a distance H between the lower edge of the first chamfer and a bottom surface of a cylinder head1Is greater than or equal to the distance H between the upper edge of the first chamfered portion and the bottom surface of the cylinder head230% of the total.
6. The valve seat insert bottom hole of claim 1, wherein a radial dimension between an outside edge of the second chamfer and a central axis of the valve is less than or equal to a distance between a location of a cylinder head gasket pressure wave and the central axis of the valve.
7. The valve seat insert bottom hole as claimed in any one of claims 1 to 6, wherein the first and second chamfered portions are each rounded.
8. The utility model provides a valve seat circle bottom hole, valve seat circle bottom hole is equipped with the chamfer, a serial communication port, the chamfer includes the edge first chamfer and the second chamfer that the radial direction of valve seat circle bottom hole set up from inside to outside, first chamfer with second chamfer forms the ladder chamfer, first chamfer is the arc chamfer, second chamfer is the radius angle.
9. The valve seat insert bottom hole according to claim 8, wherein the first chamfer is a circular arc chamfer having a radius of curvature R, or the first chamfer is an arc chamfer having a gradually changing radius of curvature.
10. A cylinder head, characterized in that it has a valve seat insert bottom hole according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920756096.2U CN210134986U (en) | 2019-05-22 | 2019-05-22 | Valve seat insert bottom hole and have its cylinder head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920756096.2U CN210134986U (en) | 2019-05-22 | 2019-05-22 | Valve seat insert bottom hole and have its cylinder head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210134986U true CN210134986U (en) | 2020-03-10 |
Family
ID=69705408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920756096.2U Active CN210134986U (en) | 2019-05-22 | 2019-05-22 | Valve seat insert bottom hole and have its cylinder head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210134986U (en) |
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2019
- 2019-05-22 CN CN201920756096.2U patent/CN210134986U/en active Active
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